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Merge pull request #1168 from matthiasbeyer/libimagentrylist/print-empty-list

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Add flag and check whether to print empty table
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Matthias Beyer 2017-12-07 22:08:47 +01:00 committed by GitHub
commit 3fa2995c5f
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1 changed files with 16 additions and 2 deletions
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18
lib/entry/libimagentrylist/src/listers/table.rs
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@ -34,6 +34,7 @@ pub struct TableLister<F: Fn(&FileLockEntry) -> Vec<String>> {
header: Option<Vec<String>>,
with_idx: bool,
print_empty: bool,
}
impl<F: Fn(&FileLockEntry) -> Vec<String>> TableLister<F> {
@ -43,6 +44,7 @@ impl<F: Fn(&FileLockEntry) -> Vec<String>> TableLister<F> {
line_generator: gen,
header: None,
with_idx: true,
print_empty: false,
}
}
@ -56,6 +58,11 @@ impl<F: Fn(&FileLockEntry) -> Vec<String>> TableLister<F> {
self
}
pub fn print_empty(mut self, b: bool) -> TableLister<F> {
self.print_empty = b;
self
}
}
impl<F: Fn(&FileLockEntry) -> Vec<String>> Lister for TableLister<F> {
@ -81,6 +88,8 @@ impl<F: Fn(&FileLockEntry) -> Vec<String>> Lister for TableLister<F> {
},
}
let mut entries_added = 0;
entries.enumerate().fold(Ok(table), |table, (i, entry)| {
table.and_then(|mut table| {
let mut v = (self.line_generator)(&entry);
@ -102,12 +111,17 @@ impl<F: Fn(&FileLockEntry) -> Vec<String>> Lister for TableLister<F> {
}
table.add_row(v.iter().map(|s| Cell::new(s)).collect());
entries_added += 1;
Ok(table)
})
})
.and_then(|tbl| {
let mut io = stdout();
tbl.print(&mut io).chain_err(|| LEK::IOError)
if entries_added != 0 && !self.print_empty {
let mut io = stdout();
tbl.print(&mut io).chain_err(|| LEK::IOError)
} else {
Ok(())
}
})
}